Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 977	$ 1,261
Adjustments to reconcile net income to net cash provided by operating activities
Realized Investment Gains (Losses)	(119)	(30)
Amortization of deferred policy acquisition costs and present value of future profits	(1,145)	(1,212)
Increase (Decrease) in Deferred Policy Acquisition Costs	(1,052)	(1,055)
Depreciation and amortization	296	245
Gains (Losses) on Extinguishment of Debt	0	(21)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	0	28
Other operating activities, net	119	78
Change in reinsurance recoverables	349	161
Increase (Decrease) in Deferred Income Taxes	(51)	254
Change in reserve for future policy benefits and unpaid losses and loss adjustment expenses and unearned premiums	403	449
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(900)	(628)
Net cash provided by operating activities	1,405	2,000
Proceeds from Sale, Maturity and Collection of Investments [Abstract]
Proceeds from Sale of Available-for-sale Securities, Debt	17,007	19,210
Proceeds from Sale and Maturity of Securities, Fair Value Option	163	111
Proceeds from Sale of Available-for-sale Securities, Equity	562	1,171
Proceeds from Sale and Collection of Mortgage Notes Receivable	325	613
Proceeds from Limited Partnership Investments	656	298
Payments for the purchase of investments [Abstract]
Fixed maturities, available-for-sale	(16,141)	(19,919)
Payments to Acquire Available-for-sale Securities, Fair Value Option	94	180
Equity securities, available-for-sale	(384)	(1,007)
Mortgage loans	(305)	(612)
Payments to Acquire Limited Partnership Interests	298	411
Derivatives, net	154	64
Payments for (Proceeds from) Policy Loans	(14)	12
Payments to Acquire Property, Plant, and Equipment	(183)	(194)
Proceeds from Sale of Short-term Investments	(388)	1,472
Other investing activities, net	32	(1)
Payments to Acquire Businesses, Net of Cash Acquired	(175)	0
Net cash used for investing activities	945	603
Financing Activities
Additions to Contract Holders Funds	3,381	3,703
Withdrawals and other deductions from investment and universal life-type contracts	(11,737)	(12,935)
Net Change Contract Holders Funds	7,734	8,218
Repayments at maturity or settlement of consumer notes	(14)	(31)
Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase	(38)	313
Repayment of long-term debt		(585)
Return of shares under incentive and stock compensation plans and other to treasury stock	(10)	(40)
Payments for Repurchase of Common Stock	(1,050)	(800)
Dividends paid on common stock	(253)	(229)
Net cash provided by (used for) financing activities	(1,967)	(2,306)
Foreign exchange rate effect on cash	(21)	(31)
Cash, Period Increase (Decrease)	362	266
Cash - beginning of period	448	399
Cash - end of period	810	665
Supplemental Disclosure of Cash Flow Information
Income taxes paid (received)	(131)	80
Interest paid	$ (239)	$ (258)